<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>json</title>
	<script type="text/javascript">
		var json = {a:12,b:5,c:789};
		for (var i in json ){
			console.log(json[i]);
		}
		//console.log((json.a+json.b)/json.c);
	</script>
</head>
<body>
	
</body>
</html>